- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.773 inches minimum and 0.875 inches maximum
- Fastener Length
- 0.844 inches minimum and 0.875 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.367 inches minimum and 0.375 inches maximum
- Head Height
- 0.133 inches minimum and 0.150 inches maximum
- Internal Drive Style
- Torque set
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 36.0 rockwell C minimum and 40.0 rockwell C maximum
- Screw Material
- Steel comp E4340 or steel comp 4140 or steel comp 8740 or steel comp 8735 or steel comp 6150
- Screw Surface Treatment
- Cadmium and chromate
- Screw Surface Treatment Document and Classification
- QQ-P-416, TY2, CL2 fed spec single treatment response
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS1101 professional/industrial association standard
Catalogue data is compiled from public DLA/FLIS sources and is provided for
identification. Availability, condition and certification are confirmed on
quotation. OmniSynk Distribution Services is a stocking distributor.